What is the first step that should be taken after a water main is laid in place?

The first step after laying a water main is to disinfect it. This process is critical for ensuring that the newly installed main is free from harmful bacteria and pathogens that could compromise water quality. Disinfection typically involves using a chlorine solution or another approved disinfectant to treat the interior surfaces of the main. This step is essential to protect public health, as the water that will flow through the main needs to be safe for consumption.

Following disinfection, other important steps like filling the main with water, pressure testing, and testing for leaks can occur, but none of these actions can effectively ensure the safety of the water supply if the main has not been properly disinfected first. Thus, disinfection is prioritized as the foundational step in the process of preparing a water main for service.